Knitting machine



UNITE STATES!l PATENT orrron.

. HENRY; BURT, OF.NEWA`RK, JERSEY, ASSIGNOR TO` NEIARK PATENT HOSIERY KNITTING-IVEACI-IINE.

l Speccation of Letters Patent No. 11,238, dated July 4, 1854.

To all whom t may concern.'

Be itknownthat I HENRY BURT, of Newark, county of Essex, and Stat-cof New J er1: sey, have invented certain new and use ful Improvements in Machinery `for `lVIjalrlng. Looped or Netted Fabrics; andI do hereby declare; thatthe following` is: alfull,` clear, and exact description of the same, reference 'being made tothe annexed drawings, making,` a` pafrt of this specification, in which- Figure I is an isometrical view' of a machine having my improvements. F ig., II is a sectional view taken on the line` ci fr of Similar letters refer to similar. parts throughout.

Mylinvention consists, firstly, in a new method of constructing and operating` `the sink'ers, whereby I am enabled 4to greatly simplify the machine g` and, secondly, in so producing"themotions of `t-he `yarn1 carrier,

that by arrangement before` `commencing work I effect the travel of that to" the distance necessary to produce a fabric of any desired uniform width, as well as tohold the yarn carrier fixed or locked at eachextent of throw, during the time required for the accomplishment of jthe motions of the other parts of the machine.

Inmachines of common construction the sinlrers are in two sets-the one set being required to perform certain operations and the other set certain other operations, each set of operations being independent of the other, but consecutive. I use but one set of sinkers, making those of uniform construction, and operation. Between each pairof` needles I place a sinker (a) formed like (72,), This rack has asegment (d) meshing those usually `employed (to fall in turn upon the yarn as it is laid upon the needles), ex-` cepting in that partof thesinker which is below the throat, or arch. This part as seen at Figs. I and II, I carry down to some length, turning` the end at` a right angle to form an elbow, or hook, as shown in Fig. `II at (af). These sinkersare depressed, seriazfz'm, upon the yarn `by jack-levers in the usual manner, `to perform one ofthe operations, but for thepurpose of effecting all of the other motions required ofthe sinkers,

and which are to be effected simultaneously, I inclose their lower ends in a hollow bar (c) properly placed to receive them, and made movable in thej manner to be hereinafter described.` Thisbar has an opening along the top at (of), just wide enoughto.

jadmit freely the extended part of the sinkers, but immediately below, as at (0), the opening is expanded to such width, as will permit the hoo-lr (CW), and the lower end of the sinker to play vertically with freedom.`

The hook is thus confined `within the hollow bar, and by means of that hook the second,

landysimultaneous depression ofthe sinkers g is to be effected.

The vdepth of the groove 1in the bar` (c) must besuch that when the gsinkers shall bein their most elevated posi? 'tion, the bar (c) being at that time at rest, and soiplaced that thehoolrs on the sinkers Vare at the top` of the bhamber (0), the jsinkers may then be depressed by the usual action ofthe jack-levers to the extent re-` y quired, the `lower ends moving downward within the hollow` bar.

The appropriate 'yarn carrier to a collar 71,) which collar is ithe roller (f) of the lever constantly in contact with` the face of the cam. 1

The proper action of the yarn carrier, is that it shall have reciprocating motion along the distance required by the width of the fabric, and shall rest at each end during the time necessary for the action of the needles, sinkers, &c. I efect theseby attaching the l made to slide upon permanent bar (It) of lthe machine, by being `fixed upon a rack into it, centered at the back of the frame, as

shown in Fig.` I, and vibratory motion is given to it by means of a cam groove (m) cut in a Cylinder (l) placed immediately of ,the segment, a pin (10) extends down into the `cam groove (m), and' thus as the cylinder revolves the pin following I the course" of the groovegives to the segment i the` desired reciprocating motion,` and as the groove after crossing itself as before described, Ipasses around `the cylinder parallel to each end, the pin while in that part of the groove will be held? at rest.` That portio-n of the radius bar (n) which is immediatelyv over the cylinder is curved to corre*- spond with the face of the cylinder, and the bar has a slot (0) for the purpose of adjusting the position of the pin with referenceto the center (i) of the segment; it is evident that by this adjustment t-he throw of the yarn carrier, and consequently the width of the fabric to be produced may be determined. The curve of the bar before described is given to it in order that in *what-4 ever part of the slot the pin is placed the position of the pin with reference to the cylinder may always be the same, that is, pointing toward the center, whereby it is made to act uniformly in the cam groove. The' pin is secured in the desired place by a pinch nut (p) as shown, and to facilitate its passage through the crossing parts of the groove, it may have on the lower end a traveler playing freely, being a short piece of metal fitting loosely in the groove, and

sharpened at each end, as shown at (q).

The operation will be as follows: Let the main shaft be turned, in the direction indicated by the arrows, until the segment (i)V has reached the eXtreme of its throw in one direction-the pin will then be in that part of the cam groove which is parallel to one of the ends of the cylinder. If now the motion of the shaft be continued until the cam groove `has so far advanced that it is about to give a returning throw to the pin, the other parts of the machine will have taken the following positions: A yarn carrier of usual construction attached to the collar will be at one end of the set of needles ready to deposit a yarn upon the needles, the sinkers will all have been raised by the action of the bar (c) to their highest place, and that bar will have been depressed again by the appropriate action of the cam (f) to such distance as will permit the sinkers to be thrown down to their lowest place. A regular continuous motion being now given to the main shaft, the pin will by the angular direction of the cam groove be moved toward the reverse side. The yarn carrier is thus moved onward depositing a thread upon the needles -behind their beards in the usual manner of knitting machines. -A roller (r) upon the under side of the collar (71,) effects ther depressing of the sinkers in turn as the yarn is deposited under each just behind the hooked'point (s) of the sinker, which part draws the yarn down between the needles to the desired eX- tent, being that of the length of the loop. When the pin in the cam groove has passed quite to the side, the yarn carrier will have passed to the full extent of its throw, and the sinkers will have been all depressed upon the yarn, the yarn carrier will then be at rest,and held fixed in that position, inasmuch as the straight portion of the cam 'end of the needles.

but not shown herein by reason of avoiding ugnecessary complicity, now comes down in the usual manner to press the points of the beards into the grooves upon each usually styled the eyes. rIhe needles recedestill farther, as usual, and the web previously formed being held in the throat, or arch of the sinker (s), Fig. II, the continued recession of the needles brings the old loop upon the top of t-he beard, the new loop being still within the beard. The presser bar having now accomplished its purpose is Withdrawn as usual, and the sinkers are now to be raised to their highest position in order that the point (8) of the front of the arch may be above the cloth or web. So soon as this has been accomplished the needles retreat still farther, as usual, and bringing the web against the straight part of the sinkers draw the old loop resting uponthe upper side of the beard over, and then hold the web only lby the new loops which at this time are within the beards, and at the forward The sinlrers are now to be thrown vdown again in order that the cloth may be held in place by thearch or throat (s) while the needles are moving forward again to bring the new loops out of the beards, and upon the single portion or shank of the needle as commonl in knitting machines, so that a new thread may be laid upon the shanks as before described, when the sinkers shall have been raised a second time. The first raising of the sinkers is effected by an appropriately timed depression on the face'of the cam which permit-s the spring (g) to raise the hollow bar (c), and by it pressing up the sinkers by their lower ends. The first time that the sinlrers were depressed it was described as being necessarily vserz'azz'm. The second time, they are required to act together, and here the hooks on the lower ends come into play as by the action of the cam (f), at the proper time the bar (o) is depressed until the part (c) coming down upon those hooks draws the sinkers with it down to the distance required. The second raising of (lz, at suitable distances frein each other, 4

and each having its set of needles, and sinkers,` one hollow bar sutlieing to `operate the sinlzers of all the sets, and thus several Webs 5 may be netted at one and the same time. What I Claim as my invention and desire to secure by Letters Patent isl. The hollow bar (0) or its equivalent in eombinationwith the extended ends of the 10 sinkers, `for the purposes described.

2. I claim the radius bar (n) constructed and operating as described, in combination with the cylinder"y (Z) and the collar (h) for the purposes substantially as set forth herein.

`Hiaten BURT.

Witnesses: p

S. M. MAYNARD, J AMES L. ROBERTS. 

